Sites like WallpaperCave and 4KWallpapers offer the macOS Sierra mountain scene in 1920x1080, 4K, and 5K formats.
If you are looking to download this specific resolution, several platforms host collections of Apple's stock wallpapers: 1920x1080 Os X Sierra Wallpaper 38 Wallpaper Av...
Developers often maintain repositories like foxt/macOS-Wallpapers which contain the full history of Apple's default desktop pictures. Sites like WallpaperCave and 4KWallpapers offer the macOS
Lone Pine Peak in the Eastern Sierras, near the town of Lone Pine. 1920x1080 Os X Sierra Wallpaper 38 Wallpaper Av...
Threads on subreddits like r/apple often share direct links to high-quality versions of every default Mac wallpaper.